<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Label标签</title>
</head>
<body>
    <p>
        请选择您的性别:
        <input type="radio" name="sex" id="nan"><label for="nan">男</label>
        <input type="radio" name="sex" id="nv"><label for="nv">女</label>
    </p>

    今天学习了&lt;h1&gt;标签
</body>
</html>